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Program Advisory Committee (PAC)

PAC 12 Call for Proposals

PAC12 and Call for Proposals:

The Jefferson Laboratory Program Advisory Committee (PAC12) will consider new proposals, updates, and letters-of-intent. PAC12 will also review the plans for experiments in the three Halls. PAC12 will meet August 4-8, 1997. The JLab Technical Advisory Committee will make comments on the technical viability of the proposals and provide these comments to the spokespersons and the PAC prior to the meeting. As always, proposals will be judged on the quality of the physics, technical feasibility, and the ability of the group to carry out the proposed measurements.

Guidelines for New Proposals, Updates and Letters-of-Intent:

New proposals requiring beam energies up to 6 GeV will be reviewed by the PAC.

Beam Time:

The beam time request should be provided in some detail. Do not request any contingency time as the scheduling process includes this time. The beam requirements and time request, on your attached forms, should include all of the time for the following activities:


If your collaboration has an approved experiment, a conditionally approved experiment, or a deferred experiment, and you would like to modify the physics goals, significantly change your running conditions, receive reconsideration of your scientific rating, or achieve full approval for a conditionally approved or deferred experiment, please submit an update.

Note: The PAC may or may not choose to hear an oral presentation for updates depending on the scope of the proposed changes.

Deferred experiments:

Deferred experiments must be updated within one year or they will be removed from future consideration.

Rejected Proposals:

Note, a proposal based on a previously rejected proposal is considered to be a `new' proposal. Further, this 'new' proposal must include substantive changes that fully address the issues raised by the previous PAC for it to be considered by the new PAC.


Letters-of-intent may be submitted to solicit the evaluation by the PAC of a new line of research before investing the large effort required to prepare a full proposal. In general, the letters-of-intent will involve either a major new experimental apparatus or extension of present beam properties. Letters-of-intent will be made public after receiving PAC appraisal in the same manner as full proposals. This means that the research program contained in them would enter the public domain; therefore, the letters-of-intent mechanism cannot be viewed as a means of "staking out territory." Rather, it provides experimenters with feedback at an early stage on the PAC's views on the scientific and technical merit of an idea which the experimenters intend to develop into a full proposal.

Due Date New Proposals, Updates and Letters-of-Intent

Proposals, Updates and Letters-of-Intent are due in the User Liaison Office by close of business Thursday, June 26, 1997. Faxes will not be accepted. If you would like to experiment with submitting your proposal electronically in either HTML, PDF or postscript format, please contact the User Liaison Office by June 17, 1997. We will test our ability to locally acquire and print a draft of your proposal. If successful, you may submit your proposal electronically by 3:00 p.m. on the due date stated above.

All proposals and updates to be considered by the PAC must also include a completed:

These sheets are available at or via anonymous ftp at in pub/pac/attachments in PDF and postscript formats.

Procedures for experiments are given in detail at the URL below. The procedures include the submission and re-submission of proposals, the PAC's scientific ratings and recommendations of Approval, Conditional Approval, Deferral or Rejection and beam-time, the Directors award of beam-time, the experiment preparation and scheduling processes, the associated Environment, Health and Safety reviews, the running of the experiments, the allocation of computational resources, and the publication of results including presentations at conferences.

Note, many of the one-page summaries of the currently approved and conditionally approved experiments are available on the Experiment Database. A calendar including the Accelerator and experiment schedule is available at If you would like any of the materials on the Web sent to you in hardcopy, please contact the User Liaision Office via phone (757-269-7586), fax (757-269-7003) or e-mail (